The standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is the density of the material?


21 475 kg/m3

Physics & Space Science

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The Sun is spherical due to

A) Earth circling it. B) Earth and Moon circling it. C) gravitation. D) none of the above

Physics & Space Science

A planet (or comet) will speed up as it approaches the Sun

Indicate whether the statement is true or false

Physics & Space Science

If a star has a parallax of .005", then its distance is ________ light-years

Fill in the blank(s) with correct word

Physics & Space Science

A parallel-plate capacitor with plate separation of 1.0 cm has square plates, each with an area of 6.0 × 10-2 m2

What is the capacitance of this capacitor if a dielectric material with a dielectric constant of 2.4 is placed between the plates, completely filling them? (?0 = 8.85 × 10-12 C2/N ? m2) A) 15 × 10-12 F B) 15 × 10-14 F C) 64 × 10-14 F D) 1.3 × 10-12 F E) 1.3 × 10-10 F

Physics & Space Science